Fix the Saab.
You're obviously happy with it (enough not to realize that it's Vauxhall by any other name

), it's the cheapest option and you know the car, you know it's faults so it's far less likely to go massively wrong (which is the risk you take with any second hand car purchase, no matter how hard daddy gives it the once over

).
To be honest it doesn't even sound like you know what you want, but will happily shoot down suggestions of what you don't. You say fairly quick, then mention you've been looking at Diesel Accords. You say that you don't want bland, but then there's the diesel Accord. Then you say you want something RWD... which last time I checked, a diesel Accord isn't. You set a budget of £5,000 in the original post, then you drop the bombshell that you'd be happy to take out a loan of another £10,000?